Question: What is the terrorist attack with the highest number of deaths whose participant is Grupos Antiterroristas de Liberación ?
Paraphrase: Which was the terrorist attack of Grupos Antiterroristas de Liberación that resulted in  highest number of deaths ?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q5710433 . ?ent wdt:P1120 ?obj . ?ent wdt:P710 wd:Q1259273 } ORDER BY DESC(?obj)LIMIT 5